Liftgate



FIG. 1 is a front perspective view of a liftgate showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

It will be understood that the broken lines shown in the drawings illustrate portions of the liftgate that form no part of the claimed design. 

CLAIM The ornamental design for a liftgate, as shown and described. 